I can't add more than 4 characteristics

RE: I can't add more than 4 characteristics

Sigurd — Tue, 03 Dec 2019 15:44:01 GMT

Great! My guess, without looking at the code, would be that some of the characteristics/services init code used saadc to something, and therefore required saadc_init() to be run before service_init().

RE: I can't add more than 4 characteristics

Caner Celiktas — Tue, 03 Dec 2019 06:18:06 GMT

Problem solved ! It is not about parameters. I tried what you say yesterday. "cccd_md_9.vloc = BLE_GATTS_VLOC_STACK" already defined in my other characteristic functions but they were also don't work. I debug again after i recieve your reply and when i add other characteristics i realize my mcu start to stuck at "nrf_saadc_event_check" function in nrf_saadc.h. So in my main function i moved saadc_init before service_init function and it start to work. Yes we solved the problem but what caused this ? I really want to know. Thank you for your help Sigurd !

RE: I can't add more than 4 characteristics

Sigurd — Mon, 02 Dec 2019 17:42:12 GMT

It took a quick look at the code, it seems like you are missing this:

cccd_md_9.vloc = BLE_GATTS_VLOC_STACK;

in your motor2_control_register_char_add() function.

RE: I can't add more than 4 characteristics

Caner Celiktas — Mon, 02 Dec 2019 06:46:11 GMT

I checked my paramters. I used same params like other working characteristics. I couldn't understand what's going on. I think my SoftDevice doesn't has enough size. I'm using nRF52810.

RE: I can't add more than 4 characteristics

Sigurd — Fri, 29 Nov 2019 14:22:18 GMT

You can find the documentation for sd_ble_gatts_characteristic_add() here.

NRF_ERROR_INVALID_PARAM is here described as "Invalid parameter(s) supplied, service handle, Vendor Specific UUIDs, lengths, and permissions need to adhere to the constraints."

RE: I can't add more than 4 characteristics

Caner Celiktas — Fri, 29 Nov 2019 13:10:43 GMT

I actived the 5th characteristics and i got error but it's not "fatal error". And i hit the NRF_BREAKPOINT_COND end of debug.

<error> app: ERROR 7 [NRF_ERROR_INVALID_PARAM] at /Nordic/nRF5_SDK_15.0.0_a53641a/nRF5_SDK_15.0.0_a53641a/examples/ble_peripheral/ble_app_Nordic_TEKNOGON/pca10040e/s112/ses/our_service.c:657
PC at: 0x0001E7AD
<error> app: End of error report

Relevant section:

err_code = sd_ble_gatts_characteristic_add(p_our_service->service_handle_3, 
                                    &char_md_9, &attr_char_value_9, 
                                    &p_our_service->char_handles_9);

APP_ERROR_CHECK(err_code); //LINE 657

RE: I can't add more than 4 characteristics

Sigurd — Fri, 29 Nov 2019 12:42:46 GMT

[quote user="Caner Celiktas"]I added but still can't see any error message.[/quote]

Are you still seeing "Fatal error" being printed ? Do you hit the NRF_BREAKPOINT_COND in app_error_fault_handler() ?

RE: I can't add more than 4 characteristics

Caner Celiktas — Thu, 28 Nov 2019 07:02:34 GMT

I added but still can't see any error message.

RE: I can't add more than 4 characteristics

Sigurd — Wed, 27 Nov 2019 16:57:10 GMT

Hi,

Likely because there is not enough room in the advertising packet to advertise the UUID of all services. But you don't really need to put all UUIDs in the advertising packet anyway, the central will discover them when it connects.

[quote user="Caner Celiktas"]i got fatal error.[/quote]

You should then use the Debug configuration, the error-code should then be printed:

If you don't have a Debug configuration, then add DEBUG as a Preprocessor define in the project settings.

RE: I can't add more than 4 characteristics

Caner Celiktas — Wed, 27 Nov 2019 06:08:07 GMT

Hi Sigurd,

When i works with 4 characteristics the output is :

<debug> nrf_sdh: State request: 0x00000000
<debug> nrf_sdh: Notify observer 0x0001FA74 => ready
<debug> nrf_sdh: State change: 0x00000000
<debug> nrf_sdh: State change: 0x00000001
<debug> nrf_sdh_ble: RAM starts at 0x20001C18
<debug> nrf_sdh_ble: RAM start location can be adjusted to 0x20001BD8.
<debug> nrf_sdh_ble: RAM size for application can be adjusted to 0x4428.

There is no output if i open other characteristics. I changed the ram start 0x20001C18 to 0x20001BD8 and ram size to 0x4428. Nothing change.

Edit : If i do like this, my 3 services and 4 characteristics work fine.

static ble_uuid_t m_adv_uuids[] =                                               /**< Universally unique service identifiers. */
{
    {BLE_UUID_OUR_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN}
//    {BLE_UUID_OUR_SERVICE_UUID_2,BLE_UUID_TYPE_VENDOR_BEGIN},
//    {BLE_UUID_OUR_SERVICE_UUID_3, BLE_UUID_TYPE_VENDOR_BEGIN}
};

When i uncomment other two services, i got fatal error.

RE: I can't add more than 4 characteristics

Sigurd — Tue, 26 Nov 2019 13:02:51 GMT

Hi,

How does your nrf_log output look like, any errors printed ? (either via UART or Segger RTT backend)

If you are not getting any RTT logs, you might need to set NRF_FPRINTF_FLAG_AUTOMATIC_CR_ON_LF_ENABLED to 0 in sdk_config.h

Your RAM_START value seems a bit low, but nrf_log should output the correct value for you in case it's not correct.